NASCAR released a statement just after 11 a.m. Sunday, endorsing Stewart's decision. “Our thoughts and prayers go out to the family, friends, and fellow competitors of Kevin Ward Jr.," the statement said. "We support Tony Stewart’s decision to miss today’s race and we will continue to respect the process and timeline of the local authorities and will continue to monitor this situation moving forward.”

Coming out of Turn 2, Stewart's car squeezed Ward's car up into the outside wall, turning it around, according to USATODAY and multiple other reports. Ward's car had a flat tire. Ward exited the car to show his displeasure with Stewart's move. He marched down the track and was pointing at Stewart's car as he approached on the ensuing lap. The cars were slowing down. Stewart's car clipped Ward, who was run over and thrown a few yards down the track.

Ward, who races the No. 13 sprint car at the track, started racing go-karts in 1998 at 4, according to kevinwardracing.com.

"A tragic accident took place last night during a sprint car race in which Tony Stewart was participating, Tony was unhurt, but a fellow competitor lost his life. Our thoughts and prayers go out to his family and friends. We're still attempting to sort through all the details and we appreciate your understanding during this difficult time."

The sheriff investigating the on-track accident involving Tony Stewart that resulted in the death of a fellow driver says there is no evidence of "criminal intent" on the part of the three-time NASCAR champion.